Saturday, August 13, 2022
SCIENMAG: Latest Science and Health News
No Result
View All Result
  • Login
  • HOME PAGE
  • BIOLOGY
  • CHEMISTRY AND PHYSICS
  • MEDICINE
    • Cancer
    • Infectious Emerging Diseases
  • SPACE
  • TECHNOLOGY
  • CONTACT US
  • HOME PAGE
  • BIOLOGY
  • CHEMISTRY AND PHYSICS
  • MEDICINE
    • Cancer
    • Infectious Emerging Diseases
  • SPACE
  • TECHNOLOGY
  • CONTACT US
No Result
View All Result
Scienmag - Latest science news from science magazine
No Result
View All Result
Home SCIENCE NEWS Atmospheric Science

On calm days, sunlight warms the ocean surface and drives turbulence

March 1, 2021
in Atmospheric Science
0
Share on FacebookShare on Twitter

IMAGE

Credit: Derek Coffman, NOAA.

CORVALLIS, Ore. – In tropical oceans, a combination of sunlight and weak winds drives up surface temperatures in the afternoon, increasing atmospheric turbulence, unprecedented new observational data collected by an Oregon State University researcher shows.

The new findings could have important implications for weather forecasting and climate modeling, said Simon de Szoeke, a professor in OSU’s College of Earth, Ocean, and Atmospheric Sciences and the lead author of the study.

“The ocean warms in the afternoon by just a degree or two, but it is an effect that has largely been ignored,” said de Szoeke. “We would like to know more accurately how often this is occurring and what role it may play in global weather patterns.”

The findings were just published in the journal Geophysical Research Letters. Co-authors are Tobias Marke and W. Alan Brewer of the NOAA Chemical Sciences Laboratory in Boulder, Colorado.

Over land, afternoon warming can lead to atmospheric convection and turbulence and often produces thunderstorms. Over the ocean, the afternoon convection also draws water vapor from the ocean surface to moisten the atmosphere and form clouds. The warming over the ocean is more subtle and gets stronger when the wind is weak, said de Szoeke.

De Szoeke’s study of ocean warming began during a research trip in the Indian Ocean several years ago. The research vessel was equipped with Doppler lidar, a remote sensing technology similar to radar that uses a laser pulse to measure air velocity. That allowed researchers to collect measurements of the height and strength of the turbulence generated by the afternoon warming for the first time.

Previous observations of the turbulence over the ocean had been made only by aircraft, de Szoeke said.

“With lidar, we have the ability to profile the turbulence 24 hours a day, which allowed us to capture how these small shifts in temperature lead to air turbulence,” he said. “No one has done this kind of measurement over the ocean before.”

Researchers gathered data from the lidar around the clock for about two months. At one point, surface temperatures warmed each afternoon for four straight days with calm wind speeds, giving researchers the right conditions to observe a profile of the turbulence created in this type of sea surface warming event.

It took a “perfect storm” of conditions, including round-the-clock sampling by the lidar and a long ocean deployment, to capture these unprecedented observations, de Szoeke said.

Sunlight warms the ocean surface in the afternoon, surface temperatures go up by a degree Celsius or more. This warming occurs during roughly 5% of days in the world’s tropical oceans. Those oceans represent about 2% of the Earth’s surface, about the equivalent of the size of the United States.

The calm wind and warming air conditions occur in different parts of the ocean in response to weather conditions, including monsoons and Madden-Julian Oscillation, or MJO, events, which are ocean-scale atmospheric disturbances that occur regularly in the tropics.

To determine the role these changing temperatures play in weather conditions in the tropics, weather models need to include the effects of surface warming, de Szoeke said.

“There are a lot of subtle effects that people are trying to get right in climate modeling,” de Szoeke said. “This research gives us a more precise understanding of what happens when winds are low.”

###

The research was supported by NOAA and the Office of Naval Research.

Media Contact
Simon de Szoeke
[email protected]

Original Source

https://beav.es/J2j

Related Journal Article

http://dx.doi.org/10.1029/2020GL091299

Tags: Atmospheric ChemistryAtmospheric ScienceClimate ChangeClimate ScienceTemperature-Dependent PhenomenaWeather/Storms
Share25Tweet16Share4ShareSendShare
  • Amanda Poholek, Ph.D.

    Reinvigorating ‘lost cause’ exhausted T cells could improve cancer immunotherapy

    122 shares
    Share 49 Tweet 31
  • A new method boosts wind farms’ energy output, without new equipment

    75 shares
    Share 30 Tweet 19
  • Researchers fabricate cobalt copper catalysts for methane on metal-organic framework Contributes to goal of methane production from carbon dioxide emissions

    67 shares
    Share 27 Tweet 17
  • New insights on how some individuals with obesity can lose weight – and keep it off

    66 shares
    Share 26 Tweet 17
  • Brightest stars in the night sky can strip Neptune-sized planets to their rocky cores

    65 shares
    Share 26 Tweet 16
  • The North American Menopause Society releases its 2022 Hormone Therapy Position Statement

    145 shares
    Share 58 Tweet 36
ADVERTISEMENT

About us

We bring you the latest science news from best research centers and universities around the world. Check our website.

Latest NEWS

Reinvigorating ‘lost cause’ exhausted T cells could improve cancer immunotherapy

Experts optimistic about converting coal plants to production of clean geothermal energy

A role for cell ‘antennae’ in managing dopamine signals in the brain

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 193 other subscribers

© 2022 Scienmag- Science Magazine: Latest Science News.

No Result
View All Result
  • HOME PAGE
  • BIOLOGY
  • CHEMISTRY AND PHYSICS
  • MEDICINE
    • Cancer
    • Infectious Emerging Diseases
  • SPACE
  • TECHNOLOGY
  • CONTACT US

© 2022 Scienmag- Science Magazine: Latest Science News.

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In